//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: Hooks and classes for the support of humanoid NPCs with
//			groovy facial animation capabilities, aka, "Actors"
//
//=============================================================================//

#ifndef AI_INTEREST_TARGET_H
#define AI_INTEREST_TARGET_H

#if defined(_WIN32)
#pragma once
#endif

//-----------------------------------------------------------------------------
// CAI_BaseActor
//
// Purpose: The base class for all facially expressive NPCS.
//
//-----------------------------------------------------------------------------

class CAI_InterestTarget_t {
   public:
    enum CAI_InterestTarget_e {
        LOOKAT_ENTITY = 0,
        LOOKAT_POSITION,
        LOOKAT_BOTH
    };

   public:
    bool IsThis(CBaseEntity *pThis);
    const Vector &GetPosition(void);
    bool IsActive(void);
    float Interest(void);

   public:
    CAI_InterestTarget_e m_eType;  // ????

    EHANDLE m_hTarget;
    Vector m_vecPosition;
    float m_flStartTime;
    float m_flEndTime;
    float m_flRamp;
    float m_flInterest;

    DECLARE_SIMPLE_DATADESC();
};

class CAI_InterestTarget : public CUtlVector<CAI_InterestTarget_t> {
   public:
    void Add(CBaseEntity *pTarget, float flImportance, float flDuration,
             float flRamp);
    void Add(const Vector &vecPosition, float flImportance, float flDuration,
             float flRamp);
    void Add(CBaseEntity *pTarget, const Vector &vecPosition,
             float flImportance, float flDuration, float flRamp);
    int Find(CBaseEntity *pTarget) {
        int i;
        for (i = 0; i < Count(); i++) {
            if (pTarget == (*this)[i].m_hTarget) return i;
        }
        return InvalidIndex();
    }

    void Cleanup(void) {
        int i;
        for (i = Count() - 1; i >= 0; i--) {
            if (!Element(i).IsActive()) {
                Remove(i);
            }
        }
    };

   private:
    void Add(CAI_InterestTarget_t::CAI_InterestTarget_e type,
             CBaseEntity *pTarget, const Vector &vecPosition,
             float flImportance, float flDuration, float flRamp);
};

//-----------------------------------------------------------------------------
#endif  // AI_INTEREST_TARGET_H